International Journal of Innovative Research and Development

Abstract

This paper reviews previous work done on performance analysis of extended surfaces (fins) under free and forced convection in order to determine the enhancement in the heat transfer rate. The Thermal resistance and pressure drop are considered as the multiple thermal performance characteristics. The effects of geometric parameters, fin height, fin diameter fin material and base-to ambient temperature difference on the heat transfer performance of fin arrays and the optimum fin separation value has been determined. The studies have shown that the convection heat transfer rate from fin arrays depends on all geometric parameter, fin material and base-to-ambient temperature difference..Heat transfer increases with the increase in approach velocity, pin diameter, and number of pins. The effect of fin density on the heat transfer performance is examined Heat transfer also increases with the thermal conductivity of the material and with the pin height. In-line arrangement gives higher heat sink resistance and lower pressure drop than the staggered arrangement. Heat transfer models for in-line and staggered arrangements are suitable in designing pin-fin heat sinks. The effect on Re on the behavior the channel are also studies.

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